A method of interrogating a phase based transducer by providing a pulsed input including two different wavelengths. The different wavelength components can be used to derive a phase change experienced by a synthetic wavelength, and by arranging for the synthetic wavelength to be significantly greater that the component wavelengths, the phase so detected has a reduced sensitivity, and is less susceptible to overscaling effects.
申请公布号
WO2009007694(A1)
申请公布日期
2009.01.15
申请号
WO2008GB02306
申请日期
2008.07.04
申请人
QINETIQ LIMITED;DEFREITAS, JOLYON;CRICKMORE, ROGER, IAN